New feature:

Under Quick Links in the navigation bar up top, you'll find Open vB Pager.
This will open a window showing you who's online and allow you to send an Instant Message to them.

Links for the pager are also available on the <a href="http://www.movie-list.com/forum/member.php?u=1">User Profile</a> pages, as well as the <a href="http://www.movie-list.com/forum/online.php">Currently Active Users (aka: Who's Online) Page</a> and on each post.